Year	%
1994	27.84653
1999	33.13056
2001	36.10925
2002	36.84134
2003	39.72867
2004	33.17329
2005	33.44198
2006	33.58026
2007	35.78704
2008	31.1447
2009	35.9566
2010	32.97326
2012	22.38912
2013	28.24416
2014	29.99235
2015	28.10774
2016	28.31419
2017	27.75453
2018	25.78606
2019	20.74287
2020	19.91802
2021	16.32008